| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5a: -20°F to -15°F Zone 7a: 0°F to 5°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| Average First Frost Date: | Aug. 21 - Aug. 31 | |
| Average Last Frost Date: | Jun. 11 - Jun. 20 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 11a - John Day/Clarno Uplands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 97869 - Prairie City, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 21 | 25 | 29 | 35 | 41 | 45 | 45 | 37 | 31 | 26 | 18 | 31 |
| Avg Max Temp (°F) | 38 | 44 | 50 | 57 | 65 | 74 | 84 | 85 | 75 | 63 | 47 | 38 | 60 |
| Avg Precip (In.) | 1.65 | 1.24 | 1.55 | 1.5 | 1.74 | 1.35 | .64 | .74 | .78 | 1.1 | 1.63 | 1.75 | 15.68 |